Stopping mechanism for looms



Oct. 6, 1931. W. H. BAKER 1,326,444

STOPPING MECHANISM FOR LOOMS Filed July 19, 1929 2 Sheets-Sheet 1HOW/lam M Baker Oct. 6, 1931. w. H. BAKER STOPPING MECHANISM FOR LOQMSFiled July 19, 1929 2 Sheets-Sheen 2 fweiziar: lVf/fiam /1. Baker IPatented Oct. 6,1931

2 WILLIAM taken, or "MO T EAL, QUEBEC, CANADA STOPPING MECHANISM FORLooms 2 Application filed' luly 19,

This, invention relates to imprWenrents in e stopping mechanism forlooms, warping machines andother devices dealing with a series ofseparate threads moving side by side, in

, 5 which the stepping mechanism becomes operative upon the breaking orexcessive slackening of any of said-threads. The primary objects of theinvention is to enable the use, in connection with power knockmechanisms including a vibrating member adapted'for operative,engagement with a knock-off element,- of stop mechanisms, embodyingnotched feeler I bars sllding in notched guide bars and associated withdrop wires supported by the-threads normally out of operative-engagementwith the feelerbars and guide bars.- A'further object is to provide anovel mannerof im'partingoperatingfforce to stop mechanismsasaforesaid;I

1 20 Theinvention comprises "essentially the provision of a stop:mechanism embodying notched longitudinally movable efeeler barsassociated with'me'ans operable-by arrest of movement'pf any f t he barsto so position a normallymoving member that it will actuate a normallystationary member operati-vely connected to the knock off mechanism ofthe loom orother machine. I

Iii-the accompanying drawings 'whichil'lus- I 'trate-one-embodiment ofthe invention but to whichembodime itand the details thereofthe"invention is not'confined as modificationsfof the illustratedembodiment and substitution [of ether embodiments arepossible' .Fig. 1.is a fragmentaryend elevation of a V loom having knock oflt' "actuatingmechanism independent of the lay, illustrating the manher of attaching'largerscale. i V

' F ig.i3 is a fragme ry fr flm 01 thewarp stop mechanism.

V fF' 41 is :a fra mentar rear elevation of V s a r 2 v warpstopmotiom rhis a cross-sectionahwsw of the v1 brat?) r wings at 2 about the line t'ezifz i r s V v I member is in its'normal ;position, is.-moved warp stopmechanism 1929. Serial N 0. 379,"536.

Referring more particularly to the drawings, 11 designates portions of(a loom frame and 1 2 the usual main shaft. A shaft 13 is providedadjacent the main shaft and is operatively connected thereto byugears 14adapted'to rotate the shaft 13 at half the angular speed of the shaft12. The shaft 13 carries acam 15 adapted to oscillate anarm 16 pivotedto the frame at 17, one end of the aim being held in engagement with thecam by a spring 18 (or equivalent (device) .connected to a lug 19 on thearm. The end .of the arm opposite to that engaging the cam carriesgpi-votally mounted thereon :a member 20 terminatingfin acatc'h 21whichpwhenithe by the oscillation of the arm :16 back and forth'over alug 22 operatively connected to a knock-off rod 23 .arrane'ed inanysuit-able Way to effectistopping of theloom. Associated with the loommechanism just describedis a warp stop motion designated as a whole bythe numeral 24,:thesaidstop motion being mounted on :the loom the usual:or any suitable manner illustration of the actual mounting beinghowever omitted as the same forms no part of the present invention, Thetype of warp stop motion'herein coiitempl ated embodies notched Ifeelerbars sliding in notched guides andliassociated with drop wires eachsupported by a warp thread and designed to drop, upon breaking .orexce'ss-ive slackening of a warp thread, intoithe notches of-the relatedfeeler bar .and guide, so as to arrest the motion :of the feeler bar. 2As exemplaryof this type .of warp stop mo- .tion, there is illustratedan improved mechanism fwhichlis fully described in my prior applicationSerial Number 344,235, [filed March 5th,, 1929. to which applicationreferen'ce may be had, but it wlill be understood that the. presentinvention is not confined to the particular warp i stop motionillustrated andflhereinafter described but extends toflthe use of allwarp stop motions :of the typeifor- "merly described in combination withm stopping mechanisms of the typeialreadytdescribed Y i I 2 The warpstop motion-comprisesa frameworkl25 extending'from endto end lo'f al'oomr as: usual (although only one end of said "date'd May 21, V guidebarmay10 framework isillustrat-edl and having at each end a cross bar26notched in its upper edge for reception of any suitable number of guidebar's 27, whichextend from end to end of the framework in the well knownmanner; as shownfon instance inPatent No. 1,026,9551, 1912. The loweredge ofeach to receive the cross embracing, a'ndthe guide bar will beheld against lateral and longitudinal. movement;

guide bar is notched in its upper edge as indicated at-28l Afeeler bar29 is slidably I mounted in the'grooveof each guide bar and L isprovided on its upper edge :with notches 3Q adaptedi to inovetoand froacross the not-chesiof the guide bar asfthe feeler bar is longitudinallyreci 'jrocated 'in'the guide bar.

1%; guide bar retainerf3'1 is hinged to each end ofthe frame and isformedto normally oven lieitheendsj of the guide bars and hold themagainst rising out ofthe cross bar notches.

E will be understood that any other sort of gu 'dfe barisupporting andretaining mechaif nis in i'nay'be substituted.

-Th=fe1er bars maybe reciprocated in any suitableiway, for example, bymeans offlexible fi'ngerjs 32 rigidly fconnected" to a viifbrator"33'and'passing through studs 34 rigidtheframework 25 and isconnected releasably" 1y connected to the feeler bars and sliding inslots'3 5in'the guide-bars. The vibrator is in turn mounted on a,shaft36 supportedin otherwise with anoperating arm 37.

The operating arms? is connecte'd bya rod means iof,asetscrew 42ozequivalent.-

d .The effective position of 20 11S, determined by the condition" of thefeele'r' bars t'l 1at"-is, by' whether the bars are free froin"unhampered reciprocation or Wheth 't er ei foee of any n 71 5 1 7'of'them' has "been arrested by the falling of;

[,Iii'ith'e' particular stop motion illusg V tratedQ the positioning ofthe catch-member:

' =20to actuatethe knockfofi" mechanism and to maintain thepath' memterin inoperative positioncomprises thefollowing instrumentalities ;-fjpalir wings 43am hingedlv m nted e t ish f an f 'e J -i Vtweenthemthe',feelerbardriving studslsee .7 At 7 the; rear .of the 1 0m;Ithe gs re be notched at one end at least, bar where it (thegui-de bar)rests in the 'cross bar'notch, so that the 'cross bar and guide bar willbe mutually the catch member p I provided withlugsf liwhichcon-' towardone another (see Figure and are embraced between divergent walls 45 of aV-shaped notch providedonthe upper end;

of a controller 46. The controller is a bar slidable'in an extension 47of the vibrator,

being supported in the vibrator extension toward its lower end in aguide lug 4L8 and toward? its upperendbetween. antifrictionflterminatesin the axial line of the shaft 36 and bears against one arm,50' of a bell crank" 1 rollers 49-. The'lower end of the controllerlever 51Zp'ivoted in'anextension 52 of the framework 125; A spring'53 isarranged in compressionbetween the frame extension 52- and the other,arm 54 of the bell crank lever and operates through theleverto press thecontroller against the-wing lugs 44:, so'that by reason of the engagingin the V- shaped notch of the con troller, the ,win'gs are yieldinglypressed against opposite sides of the feeler bar operatingstuds. Thelever arm 54 carries an adjustably mounted extension 55 which ter-.minates in a hook 56 locat-edjapproximately vertically above the:catch-'member: A rod 57 having at its upper end a hook 58loosely hookedthrough the hook- 5'6 depends toward the-catch member andis providedwith an -;adjustably mounted end piece 59] pivotally inclined orconverging lug connected tothe catch member. The spring 53 in holding upthe lever arm154 also holds uptn'e extension 55 and-rod' 57 to suchextent 4 that thecatch member is held insuch posi-.

tion during its reciprocation-by theosoillatting arm. l6 that itdoes"not engage the lug It will be understood that other mechanisms may 1 beprovided 4 intermediate ice the feeler' bars and thefcatch member 20"for v the same purposeas the'mechanism'described and that substitutionof any such other mechanism is contemplated in the scopeof the presentinvention.

ZThe operation; of." the. {device briefly described is as followszfltotation of the half time, shaft 13 causes oscillation'of the arm 16toreciprocate the catch- Ine1nber20 over the statlonary knock-off lug22: and at the same time'causes oscillation of the vibratorf33 toreciprocate" the feeler' bars. .The spring" pressed 1 controller. 46,which is mounted up on and therefore; oscillates withrthe vibrator, i

holds thefwings 'yieldingly 'clasping relat on to, the feeler bar;operating studs, the

wings "oscillating withhthei'vibrator. FThe A engagement of thecontroller with the sta 5 tionary leverv51 being inthe axial line of theshaft 36, which theaxisof oscillationethe without friction and without'causingigany alteration in the relationfof the controller and theWings. v

1" warp thread break suliiciently, the drop wire thereon .fall sjupon Vthe feeler bar threaded through it 'a-ndfeven-l, 1 V

1 spring pressure 5 is transmitted substantially tually is caught in thenotches of the feeler bar: guide bar, thus" arresting move;

mama-44 ner. "jSincethe vibrator continues to oscillateythe; movement ofone or "other of the wings, "-y-ieldingly 'con-n'ect-ed; to the vibratorfor oscillation. therewith and engaging the driving-stool 'ofjt'hearrested ieeler' banwiil also be arrested; c This-stoppage of wingmovement causes the controller notch to thrust laterally against thewing lug and,

byv reason of the, inclination of the engaging surfaces of the "lug andnotch, the controller is forced downwardly and rocks the be'll cranklever -51 aga-inst 'th-e pressure of the spring '53." This movement ofthe lever; is

communicated through its extension-5'5 and therod 5-7 to'thecatc'hmember QOrpermittmg the catch member to fall into position where itscatchi21wil'l engage the lug QZan'tl' trans mit motion from;thepositively oscillated arm 16 to the knocl'r oifactnating rod 23, so

- that'the dri-vingpower' disconnected from the 100m and th'eloomstopped. When the I defect causing the st'oppage has been remedied, thespring 58*operating through the QOntrollerreStOreSthe aiiected wing tonormal relation "with thevi'brator and, in processofthisflrestoration,actsthrough the parts I and 57110 raise, the catc'hmember c'lear of the lug22-so that'the loom may-be restarted. 1 I Havingthus'described my invention, what 7 Iclaimis:,' 7

1. In a loom or tlieflilie including i normally stationary "knock ofielement, anorinallyfreciprocat'ing element for engagement '7 with saidknock-on element to -stopthe loom,

a --shaft, "and operative- 1 connection between said shaft andthereciprocating element, the combinationoifa warpstop motion includinglongitudinally Y reciprocating 'feeler bars, operative connectionbetween saidfshaftyand saidbars for reciprocation thereof, and

operative connection between said'bars and 1 said reciprocating elementnormally holding thefreciprocating element out of engagement 'withjtheknock-oiielement' and operative 'u pon arrest -of movement of any feelerbar r to perniit'engagement of'thereciprocating element and knock-offelement;

7 2. In aloom-or the like including a normaliy statlonary, knock-offelement, a normally reciprocating element for engagement WlthSEHdknock-01f element to stop the-loom,

- a shaft, and operative connection between saifdsh'aft' and thereciprocating element, the combination of awarp stop motion includlngstationary notched guide bars,longitudinally [reciprocating notched,feeler bars sliding on 1 the guide'ba'rsandeach adapted to be arrestedinniotion by-engagement ofa drop wire in Lan'o tch thereof andin-an'oft'c h of the supportguide bar, operative connection 'betweenTsaid shaft and; {said for. rec procation Tthereof, and operative:connection between @said bars and-s'aidfrecip'rocating element normallyholding the reciprocating element "out :3. In a loom crane like,knock-oil? mechanism including'a normally stationary knock- 'o'ii lugand a reciprocating member for engagement with said lug, in combinationwith a warp stop motion including longitudinal-1y reciprocating feelerbars, means operatively connected between said teeler bars andreciprocating member normally holding the reciprocatingmember out of'lugengaging position and operative upon arrest of movement of any feelerbarto position the reoiprocating member for engagement with saidlug, arotating element in theloom and separate operative connections betweensaid element and the reciprocating member and between saidfelement'andthe feeler bars.

4. The combination with elements of a loom orthe like including a shaft,a cam thereon, an oscillating arm operated by said cam, a catchmemberpivotallyconnected to said arm for reciprocation thereby, .aknockofi rod and a lug thereon for engagement' by said catch member, ofgrooved guide bars notched in theiriupper edges, notched feeler barsslidable in the guide bar grooves, a

vibrator connected with said feeler bars to reciprocate the same, acrank on said-shaft, operative connection between the crank and vibratorand means operatively connected between said :feeler bars and said catchmember normally holding the catch member out of engagement with theknock-off lug, said means being operative upon arrest of'move ment of:any feeler barto releasethecatch for engagement with'the knock-off lug.

5. The combination with elements of a E said feeler bars and-saidreciprocating memi bernormally holding the reciprocating member out ofengagement with the knock-oil? element, 'said'mean's being operativeupon arrest of movement of: any teeler bar torelease the reciprocatingmember for engagement with the knock-off element. r

j "6, The mmbinatmmwith elements of p a loom orthe like including anormally station- "ary l-knoc'k oii 5 element, ashaft, a cam there- Ithe guide bars and each adapted to be arrestedin motion'by engagement ofa drop wire driving connections for the feeler 'bars,

means normally operating to hold said recip rocating member out ofengagement 'withsaid knock-oft element, and means actuated by thecombined movement of the vibrator and arrestiof movement of any of saidfeeler bars to'move said reciprocating member holding means to releasethe reciprocatingmember for movement into engagement with the knock-offelement.

13. .A structure according to claim 12, in which the means actuatedbycombined movement of the vibrator and arrest of movement"- of a feelerbar is mounted upon the vibrator.

lLA structure according toclaim 12, in which the means actuated bycombined move ment of the vibratonand arrest of movement of a feeler barincludes a pair of pivotally mounted wings adapted to be normallyoscillated in unison by thefeeler bars and to be separately arrested inoscillation by arrest of movement of any feelerb'ar, and means engagingsaid wings and adapted to be moved by relative movement of the wings toimpart 'movementto the means normally holding the reciprocating memberout of engagement with the knock-off element.

I 15.111 aloom orthe like including a nor- ,"mally'stationary "knock oifelement, a norr mally-reciprocating element for engagement with saidknock-off element to stop the loom,

ashaft, and operative'connection. between said shaft and thereciprocating element, the combination of a Warp stop motion includingstationary notched guide bars, longitudinale 40 ly reciprocating notchedfeeler bars sliding on the guide bars and each adapted to be arrestedinmotion by engagement of a drop wire in a notch thereof and in a notchof the supportingguide bar, operative connection between said shaft andsaid bars for reciprocation thereof, a pivoted arm, a link connectedbetween said arm and the normally reciprocating member, a springactuating said arm andlink to hold thereciprocating member out ofengagement withthe knock-off element, and operative connectionbetweenindividual feeler bars and said pivoted arm for moving the arm uponarrest of movement of any feeler bar to release the reclprocating memberfor engagement'with the knock-0E element.

I 16. In a loomor the like including a normally stationary knock-01felement, a normally reciprocating element for engagement the guide barsand each adapted to be arrested .a spring actuating said arm and link tohold the reciprocating member out of engagement with the knock-0Eelement, and operative connection between individual feeler bars andsaid pivoted arm comprising a pair of stop members normally moving inunison, means to arrest the movement'of either of said stop members uponarrest of movement of any feeler bar whereby relative movement of thestop members will result, and means actuated by the relative movement ofthe stop members to move said pivoted arm to release the reciprocatingmember for engagement with the knock-ofi element.

v17 In a loom or the like including a normally stationary knock-offelement, a normally reciprocating element for engagement with saidknock-off element to stop the loom,

operative connection between said bars and said reciprocating elementnormally holding the reciprocating element out of engagement with theknock-off element and operative upon arrest of movement of any feelerbar to permit engagement of the reciprocating element and knock-01felement.

In witness whereof, I have hereunto set my hand.

WILLIAM H. BAKER.

with said knock-off element to stop the loom, a, r I

shaft, and operative connection between said shaft and the reciprocatingelement, the combination of a warp stop motion including stationarynotched guide bars, longitudinally reciprocating notched feelerbars-sliding on

